In a medium mixing bowl, combine the ground turkey, buffalo sauce, garlic powder, onion powder, sea salt, and black pepper until just incorporated.
Gently shape the turkey mixture into one large, thick patty, being careful not to overwork the meat.
Heat the avocado oil in a cast-iron skillet over medium-high heat until it begins to shimmer.
Place the patty in the skillet and sear for 5-6 minutes on the first side until a deep golden-brown crust forms.
Flip the burger and cook for another 5 minutes, or until the internal temperature reaches 165°F.
During the final minute of cooking, sprinkle the blue cheese crumbles over the patty and cover the skillet with a lid to allow the cheese to soften and melt.
While the meat rests, lightly toast the sprouted grain burger thin in a toaster or on the edge of the skillet.
Finely slice the celery stalk into thin crescents for added texture.
Assemble the burger by placing the butter lettuce on the bottom bun, followed by the buffalo turkey patty, and top with the sliced celery before closing with the top bun.